Beyoncé Congratulates Pal Serena Williams On The Birth Of Her New Bub

Serena Williams has just given birth to her daughter, and Beyoncé is thrilled for Sir and Rumi to have another brand new baby of a bestie to hang with.

The little gal is the first child for Williams and her fiancé, Alexis Ohanian, and Bey — a longtime friend who's featured the tennis great in her music videos — took to her Instagram to wish Williams and her bundle of joy on September 1.